[9] According to his autobiography, they moved to Osnabrück-Eversburg in 1993 after his mother started a relationship with a former Yugoslavian military officer who was also involved in dealing drugs.

He describes how, after dropping out of school, he committed large-scale cellphone fraud and identity theft together with a youth gang.

The rapper Kollegah, with whom Chpakov claimed to have had an online friendship due to both participating in RBA, featured him on the second sampler from Selfmade Records, Chronik 2 (2009).

[13] Sun Diego's contribution to the JBB King-Finale 2014 against Gio, which consisted of an almost 35-minute diss track, received considerable attention.

[19] Two days later, Chpakov announced that the album was to be indexed by the Federal Review Board for Media Harmful to Minors due to the song A.C.A.B.

[8] In January 2018, Chpakov announced his autobiography Yellow Bar Mitzvah – The Seven Gates from Moloch to Fame, which he co-wrote with the editor Dennis Sand [de] and published at the end of February 2018.

[23] The book reached number 2 on the Spiegel bestseller list for non-fiction (hardcover) and remained in the top 50 for a total of nine weeks.

On 29 June 2018, Juri released his first album Bratans aus Favelas through Chpakov's label Bikini Bottom Mafia.

[27] Rostov on Don and Apocalyptic Endgame, the first two songs of the album were released early on 19 November 2021 instead of in April 2022.

[31] During his initial career as a battle rapper, SpongeBOZZ was an anonymous alias and the fact that it was Sun Diego was unknown.

Names such as Kollegah, Sebastian Novak, Peter Fokin, BattleBoi Basti, and Sun Diego were suggested as possible identities.

The latter theory was supported by the fact that there were many technical similarities in the rap styles of Sun Diego and SpongeBOZZ.

Additionally, since SpongeBOZZ became popular, Sun Diego no longer appeared in public, and his Facebook page was removed.

In his music videos, SpongeBOZZ wears a SpongeBob costume with sewn-on sunglasses and frequently references the TV series in his lyrics.

Other characteristics of SpongeBOZZ's rap style, according to N24, include the use of "multi-syllabic rhyme chains, precise punchlines, an accurate flow variation," and the use of "clean tripletimes.